# LEGO 21598-1 — Underwater Adventure (2026)

Source: https://www.brickmissing.com/sets/21598-1-underwater-adventure
Publisher: BrickMissing (https://www.brickmissing.com) — free LEGO parts checker. Not affiliated with the LEGO Group.

Embark on a subterranean Minecraft journey with the LEGO Minecraft Underwater Adventure (21598-1) set, featuring 310 pieces for deep-sea exploration. This 2026 release transports players to the ocean depths, where Steve the deep-sea diver, armed with his sword and axe, navigates his boat through the waters. Accompanying Steve are a Dolphin and Tropical Fish, while a Drowned wields a trident, posing a threat amongst the coral reefs. The set recreates an Ocean Monument and an Ocean Ruin, concealing a buried treasure chest with gold and an emerald. Guardians and an Elder Guardian protect these aquatic domains, capable of firing projectile elements to thwart Steve's progress, adding action to the build. Steve's binoculars and map aid in charting the course through this block-built realm.

## Set facts

- Set number: 21598-1
- Name: Underwater Adventure
- Theme: Minecraft
- Released: 2026
- Pieces: 310
- Distinct part + colour lots: 123
- LEGO retail price: € 29,99
- Build difficulty: intermediate
- Repairability: 13.8% of this set's lots are hard to replace (17 of 123 part+colour combinations appear in three or fewer sets in the entire LEGO catalog).

## Complete parts list (123 lots, 310 pieces)

Prices are the official LEGO Pick a Brick price per individual part, where LEGO publishes one.

| Qty | Part | Colour | Part no. | LEGO element ID | LEGO price each |
| ---: | --- | --- | --- | --- | --- |
| 1 | Plate 2 x 2 | Black | 3022 | 302226 | €0,10 |
| 1 | FLAT TILE 2X2 | Black | 3068 | — | — |
| 1 | Wedge Plate 2 x 4 | Black | 51739 | 4531412 | €0,10 |
| 4 | Brick Special 1 x 1 with Stud on 1 Side | Black | 87087 | 4558954 | €0,11 |
| 2 | Bracket 1 x 2 - 2 x 2 | Black | 21712 | — | — |
| 2 | PLATE 1X1 W/HOLDER VERTICAL | Black | 52738 | — | — |
| 1 | Brick 1 x 4 | Tan | 3010 | 4113916 | €0,16 |
| 1 | Brick 2 x 2 | Tan | 3003 | 4114306 | €0,13 |
| 4 | Brick 2 x 4 | Tan | 3001 | 4114319 | €0,22 |
| 10 | Plate 1 x 3 | Tan | 3623 | 4121921 | €0,07 |
| 1 | Plate Special 1 x 2 Side Handle [Free Ends] | Tan | 2540 | 4140593 | €0,07 |
| 2 | Plate 4 x 8 | Tan | 3035 | 4509897 | €0,46 |
| 2 | Slope 30° 1 x 1 x 2/3 (Cheese Slope) | Tan | 54200 | 4516055 | €0,06 |
| 4 | Plate Special 2 x 2 with Groove and Center Stud (Jumper) | Tan | 87580 | 4565387 | €0,10 |
| 1 | Plate 6 x 8 | Tan | 3036 | 6070501 | €0,71 |
| 1 | Plate 3 x 3 | Tan | 11212 | 6115031 | €0,12 |
| 3 | Tile 2 x 3 | Tan | 26603 | 6175367 | €0,11 |
| 4 | Brick Special 1 x 1 with Studs on 2 Adjacent Sides | Tan | 26604 | 6175968 | €0,10 |
| 1 | Plate Special 1 x 4 with 2 Studs with Groove [New Underside] | Tan | 41740 | 6257600 | €0,07 |
| 4 | Plate Special 2 x 4 with Groove and Two Center Studs (Jumper) | Tan | 65509 | 6294227 | €0,18 |
| 2 | Plate Special 1 x 2 with Clip Vertical on End | Tan | 78256 | 6372047 | €0,19 |
| 1 | FLAT TILE 2X2, NO. 590 | Tan | 1005 | — | — |
| 1 | Brick 2 x 2 | Dark Purple | 3003 | 4653960 | €0,13 |
| 12 | Plate Special 1 x 2 with Handle on End [Closed Ends] | Dark Blue | 60478 | 6407191 | €0,06 |
| 1 | PLATE 2X2 W 1 KNOB | Dark Blue-Violet | 23893 | — | — |
| 2 | Plant, Flower, Plate Round 1 x 1 with 5 Petals | Dark Blue | 24866 | 6495167 | €0,04 |
| 3 | Plant, Flower 2 x 2 Leaves - Angular | Bright Green | 4727 | 4143562 | €0,15 |
| 2 | Plate Round 1 x 1 with Solid Stud | Black | 6141 | 614126 | €0,05 |
| 1 | Slope 30° 1 x 1 x 2/3 (Cheese Slope) | Orange | 54200 | 4504371 | €0,06 |
| 1 | Plate 1 x 1 | Orange | 3024 | 4524929 | €0,06 |
| 1 | FLAT TILE 1X1 | Orange | 3070 | — | — |
| 1 | Wedge Plate 2 x 4 | Orange | 51739 | 6025385 | €0,10 |
| 2 | Tile Round 1 x 1 Quarter | Orange | 25269 | 6173925 | €0,05 |
| 12 | HOLDER Ø3.2 W/TUBE Ø3.2 HOLE | Orange | 44873 | — | — |
| 4 | Plate 1 x 1 x 2/3 with Open Stud | Black | 86996 | 6388352 | €0,08 |
| 2 | Brick 2 x 4 | Yellow | 3001 | 300124 | €0,22 |
| 2 | Brick 2 x 2 | Yellow | 3003 | 300324 | €0,13 |
| 3 | PLATE 2X2 W 1 KNOB | Yellow | 23893 | — | — |
| 2 | Plate Special 1 x 2 Rounded with 2 Open Studs | Yellow | 35480 | 6248971 | €0,07 |
| 1 | Plate Special 2 x 4 with Groove and Two Center Studs (Jumper) | Yellow | 65509 | 6424448 | €0,18 |
| 4 | ROUND BRICK 1X1 | Lime | 3062 | — | — |
| 1 | MINI UPPER PART, NO. 6870 | Dark Bluish Gray | 76382 | 4275340 | — |
| 1 | FIGURE HEAD, NO. 108 | Light Lime | 111622 | — | — |
| 2 | Plate 2 x 2 | Light Bluish Gray | 3022 | 4211397 | €0,10 |
| 12 | Plate Special 1 x 2 Side Handle [Free Ends] | Light Bluish Gray | 2540 | 4542391 | €0,07 |
| 2 | Plant, Flower Stem with Bottom Bar | Light Bluish Gray | 24855 | 6269971 | €0,07 |
| 1 | Plate 2 x 4 | Very Light Orange | 3020 | 4130337 | — |
| 2 | Plate 1 x 4 | Very Light Orange | 3710 | 4130344 | — |
| 4 | Tile 1 x 4 with Groove | Tan | 2431 | 4550324 | €0,12 |
| 2 | Brick 2 x 2 | Very Light Orange | 3003 | 4130330 | — |
| 2 | PLATE 2X2 W 1 KNOB | Very Light Orange | 23893 | — | — |
| 1 | Brick 2 x 2 | Dark Bluish Gray | 3003 | 4211060 | €0,13 |
| 1 | Plate 1 x 2 | Dark Bluish Gray | 3023 | 4211063 | €0,08 |
| 1 | Plate 2 x 4 | Dark Bluish Gray | 3020 | 4211065 | €0,15 |
| 1 | Slope Curved 2 x 1 No Studs [1/2 Bow] | Dark Bluish Gray | 11477 | 6029948 | €0,06 |
| 3 | Plate Special 1 x 2 with 5.9mm Centre Side Towball | Dark Bluish Gray | 14417 | 6039479 | €0,16 |
| 1 | SPRING SHOOTER 1X4 | Dark Bluish Gray | 72387 | — | — |
| 1 | MINI BODY LOWER PART BLACK | Chrome Pink | 73200 | — | — |
| 5 | Plate 2 x 4 | Black | 3020 | 302026 | €0,15 |
| 1 | Plate 2 x 8 | Black | 3034 | 303426 | €0,29 |
| 12 | FLAT TILE 1X2 | Lavender | 3069 | — | — |
| 2 | Brick 2 x 2 | Black | 3003 | 300326 | €0,13 |
| 4 | Plate 1 x 1 | Black | 3024 | 302426 | €0,06 |
| 1 | Plate 2 x 2 | Black | 3022 | 302226 | €0,10 |
| 3 | PLATE 2X2 W 1 KNOB | Black | 23893 | — | — |
| 1 | Brick 2 x 2 | Black | 3003 | 300326 | €0,13 |
| 1 | Weapon Sword Blocky | Reddish Brown | 18787 | 6093622 | — |
| 6 | Plate Round 1 x 1 with Solid Stud | Black | 6141 | 614126 | €0,05 |
| 1 | MINI BODY LOWER PART BLACK | Dark Purple | 73200 | — | — |
| 1 | FIGURE HELMET NO.1 | Dark Purple | 34091 | — | — |
| 1 | ARMOUR, NO. 13 | Dark Purple | 7805 | — | — |
| 1 | Container Box 2 x 2 x 1 1/3 with Hinge | Medium Nougat | 7711 | 6566342 | — |
| 1 | Lid for Box Box 2 x 2, Hinged | Medium Nougat | 7712 | 6566343 | — |
| 1 | Plate 2 x 12 | Light Bluish Gray | 2445 | 4211360 | €0,36 |
| 1 | Brick 1 x 1 | Light Bluish Gray | 3005 | 4211389 | €0,07 |
| 1 | Plate 2 x 3 | Light Bluish Gray | 3021 | 4211396 | €0,13 |
| 2 | Plate 1 x 1 | Light Bluish Gray | 3024 | 4211399 | €0,06 |
| 1 | Plate 4 x 12 | Light Bluish Gray | 3029 | 4211401 | €0,63 |
| 4 | FLAT TILE 1X2 | Light Bluish Gray | 3069 | — | — |
| 1 | FLAT TILE 1X1 | Light Bluish Gray | 3070 | — | — |
| 2 | Plate 1 x 4 | Light Bluish Gray | 3710 | 4211445 | €0,12 |
| 1 | Slope 30° 1 x 1 x 2/3 (Cheese Slope) | Light Bluish Gray | 54200 | 4521921 | €0,06 |
| 2 | Bracket 1 x 2 - 2 x 2 Inverted | Light Bluish Gray | 99207 | 4654580 | €0,10 |
| 1 | Bracket 1 x 2 - 1 x 2 Inverted | Light Bluish Gray | 99780 | 6004990 | €0,10 |
| 3 | Plate Special 1 x 2 5.9mm Towball Socket | Light Bluish Gray | 14418 | 6043639 | €0,16 |
| 1 | Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) | Light Bluish Gray | 15573 | 6066097 | €0,06 |
| 1 | Plate Special 1 x 2 with Handles on Ends | Light Bluish Gray | 18649 | 6093058 | €0,12 |
| 1 | Brick Special 1 x 2 x 1 2/3 with 4 Studs on 1 Side | Light Bluish Gray | 22885 | 6123809 | €0,17 |
| 2 | PLATE 2X2 W 1 KNOB | Light Bluish Gray | 23893 | — | — |
| 1 | Tile 2 x 3 | Light Bluish Gray | 26603 | 6171894 | €0,11 |
| 1 | Brick Special 1 x 2 with Vertical Closed Handle on Edge | Light Bluish Gray | 34816 | 6198932 | €0,21 |
| 2 | Bracket 1 x 1 - 1 x 1 | Light Bluish Gray | 36841 | 6248078 | €0,05 |
| 1 | PLATE 1X2 W. 1 HORIZONTAL SNAP | Light Bluish Gray | 65458 | — | — |
| 10 | Plate Special 1 x 2 [Open O Top Clip] | Light Bluish Gray | 44861 | 6326078 | €0,15 |
| 2 | Plate 1 x 1 x 2/3 with Open Stud | Black | 86996 | 6432005 | €0,08 |
| 1 | MINI BODY LOWER PART BLACK | Reddish Brown | 73200 | — | — |
| 4 | Plate Special 1 x 2 with Door Rail | Black | 32028 | 4107761 | €0,05 |
| 4 | Bracket 1 x 2 - 1 x 2 Inverted | Black | 99780 | 6133721 | €0,10 |
| 2 | Equipment Shovel Blocky | Reddish Brown | 18791 | 6093630 | — |
| 8 | Brick 1 x 4 | Black | 3010 | 301026 | €0,16 |
| 2 | Plate 1 x 2 | Black | 3023 | 302326 | €0,08 |
| 8 | Brick 2 x 2 | Black | 3003 | 300326 | €0,13 |
| 9 | Plate Special 2 x 2 with Groove and Center Stud (Jumper) | Black | 87580 | 4565323 | €0,10 |
| 1 | Weapon Trident, Blocky | Medium Lavender | 78801 | 6431792 | — |
| 1 | Plate 1x1 with Up Right Holder | Black | 44842 | — | — |
| 1 | Plate 1 x 2 | Dark Tan | 3023 | 4528604 | €0,08 |
| 1 | Plate 1 x 4 | Dark Tan | 3710 | 4626904 | €0,12 |
| 5 | Tile 1 x 3 | Dark Tan | 63864 | 6015452 | €0,11 |
| 1 | FLAT TILE 1X1 | Dark Tan | 3070 | — | — |
| 1 | Weapon Axe Blocky | Reddish Brown | 18788 | 6093625 | — |
| 2 | Plate 1x1 Round w/ 3.2 Shaft | Trans-Clear | 31570 | — | — |
| 1 | PLATE 1X1 | Trans-Clear | 28554 | — | — |
| 1 | ROUND BRICK 1X1 | Trans-Clear | 35390 | — | — |
| 2 | ARROW 8M FOR SPRING SHOOTER | Black | 29340 | — | — |
| 2 | PLATE 2X2 W 1 KNOB | Trans-Neon Green | 92569 | — | — |
| 1 | PYRAMID RIDGED TILE 1X1X2/3 | Trans-Neon Green | 35343 | — | — |
| 2 | SLIDE SHOE ROUND 2X2 | Trans-Neon Green | 28558 | — | — |
| 2 | Plate Round 1 x 1 with Solid Stud | Yellow | 6141 | 614124 | €0,05 |
| 1 | Equipment Telescope / Torch / Spyglass, Support Round 1 x 1 x 1 2/3 | Pearl Gold | 64644 | 4538126 | €0,07 |
| 2 | Brick 2 x 2 | White | 3003 | 300301 | €0,13 |
| 1 | Brick Special 1 x 1 Studs on 4 Sides | White | 4733 | 4111971 | €0,22 |
| 2 | Plant, Flower, Plate Round 1 x 1 with 5 Petals | White | 24866 | 6206149 | €0,06 |
| 3 | Brick Special 1 x 1 x 1 2/3 with Studs on 1 Side | White | 32952 | 6218841 | €0,10 |

## Notes

- Track which of these parts you own and see what is missing: https://www.brickmissing.com/sets/21598-1-underwater-adventure
- Inventory data is based on official LEGO inventories via the Rebrickable catalog, updated daily.
- Part images, minifigure lists and related sets are on the set page: https://www.brickmissing.com/sets/21598-1-underwater-adventure